65772156 has 12 divisors (see below), whose sum is σ = 153468392. Its totient is φ = 21924048.

The previous prime is 65772149. The next prime is 65772221. The reversal of 65772156 is 65127756.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2740495 + ... + 2740518.

Almost surely, 2^65772156 is an apocalyptic number.

It is an amenable number.

65772156 is an abundant number, since it is smaller than the sum of its proper divisors (87696236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65772156 is a wasteful number, since it uses less digits than its factorization.

65772156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481020 (or 5481018 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The square root of 65772156 is about 8110.0034525270. The cubic root of 65772156 is about 403.6584293926.

The spelling of 65772156 in words is "sixty-five million, seven hundred seventy-two thousand, one hundred fifty-six".