65772553 has 12 divisors (see below), whose sum is σ = 83467152. Its totient is φ = 51250920.

The previous prime is 65772529. The next prime is 65772559. The reversal of 65772553 is 35527756.

It is not a de Polignac number, because 65772553 - 2⁵ = 65772521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65772559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60475 + ... + 61552.

It is an arithmetic number, because the mean of its divisors is an integer number (6955596).

Almost surely, 2^65772553 is an apocalyptic number.

It is an amenable number.

65772553 is a deficient number, since it is larger than the sum of its proper divisors (17694599).

65772553 is a wasteful number, since it uses less digits than its factorization.

65772553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122052 (or 122045 counting only the distinct ones).

The product of its digits is 220500, while the sum is 40.

The square root of 65772553 is about 8110.0279284353. The cubic root of 65772553 is about 403.6592415502.

The spelling of 65772553 in words is "sixty-five million, seven hundred seventy-two thousand, five hundred fifty-three".