65772164 has 6 divisors (see below), whose sum is σ = 115101294. Its totient is φ = 32886080.

The previous prime is 65772149. The next prime is 65772221. The reversal of 65772164 is 46127756.

It can be written as a sum of positive squares in only one way, i.e., 65772100 + 64 = 8110^2 + 8^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221517 + ... + 8221524.

It is an arithmetic number, because the mean of its divisors is an integer number (19183549).

Almost surely, 2^65772164 is an apocalyptic number.

It is an amenable number.

65772164 is a deficient number, since it is larger than the sum of its proper divisors (49329130).

65772164 is a wasteful number, since it uses less digits than its factorization.

65772164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443045 (or 16443043 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 65772164 is about 8110.0039457450. The cubic root of 65772164 is about 403.6584457585.

It can be divided in two parts, 657721 and 64, that multiplied together give a square (42094144 = 6488²).

The spelling of 65772164 in words is "sixty-five million, seven hundred seventy-two thousand, one hundred sixty-four".