66346772 has 24 divisors (see below), whose sum is σ = 121216200. Its totient is φ = 31743360.

The previous prime is 66346757. The next prime is 66346783. The reversal of 66346772 is 27764366.

It can be written as a sum of positive squares in 4 ways, for example, as 10784656 + 55562116 = 3284^2 + 7454^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5354 + ... + 12702.

It is an arithmetic number, because the mean of its divisors is an integer number (5050675).

Almost surely, 2^66346772 is an apocalyptic number.

It is an amenable number.

66346772 is a deficient number, since it is larger than the sum of its proper divisors (54869428).

66346772 is a wasteful number, since it uses less digits than its factorization.

66346772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451 (or 7449 counting only the distinct ones).

The product of its digits is 254016, while the sum is 41.

The square root of 66346772 is about 8145.3527854845. The cubic root of 66346772 is about 404.8305382581.

The spelling of 66346772 in words is "sixty-six million, three hundred forty-six thousand, seven hundred seventy-two".