672561337 has 16 divisors (see below), whose sum is σ = 804324352. Its totient is φ = 550229760.

The previous prime is 672561313. The next prime is 672561353. The reversal of 672561337 is 733165276.

It is a cyclic number.

It is not a de Polignac number, because 672561337 - 2¹¹ = 672559289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 672561337.

It is not an unprimeable number, because it can be changed into a prime (672561397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5388 + ... + 37069.

It is an arithmetic number, because the mean of its divisors is an integer number (50270272).

Almost surely, 2^672561337 is an apocalyptic number.

It is an amenable number.

672561337 is a deficient number, since it is larger than the sum of its proper divisors (131763015).

672561337 is a wasteful number, since it uses less digits than its factorization.

672561337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42568.

The product of its digits is 158760, while the sum is 40.

The square root of 672561337 is about 25933.7875560050. The cubic root of 672561337 is about 876.1476476142.

The spelling of 672561337 in words is "six hundred seventy-two million, five hundred sixty-one thousand, three hundred thirty-seven".