746561665 has 4 divisors (see below), whose sum is σ = 895874004. Its totient is φ = 597249328.

The previous prime is 746561659. The next prime is 746561687. The reversal of 746561665 is 566165647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566165647 = 181 ⋅3127987.

It can be written as a sum of positive squares in 2 ways, for example, as 168688144 + 577873521 = 12988^2 + 24039^2 .

It is a cyclic number.

It is not a de Polignac number, because 746561665 - 2⁷ = 746561537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74656162 + ... + 74656171.

It is an arithmetic number, because the mean of its divisors is an integer number (223968501).

Almost surely, 2^746561665 is an apocalyptic number.

It is an amenable number.

746561665 is a deficient number, since it is larger than the sum of its proper divisors (149312339).

746561665 is a wasteful number, since it uses less digits than its factorization.

746561665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149312338.

The product of its digits is 907200, while the sum is 46.

The square root of 746561665 is about 27323.2806412407. The cubic root of 746561665 is about 907.1697538828.

The spelling of 746561665 in words is "seven hundred forty-six million, five hundred sixty-one thousand, six hundred sixty-five".