65924991 has 48 divisors (see below), whose sum is σ = 107557632. Its totient is φ = 38572800.

The previous prime is 65924981. The next prime is 65924993. The reversal of 65924991 is 19942956.

It is not a de Polignac number, because 65924991 - 2⁵ = 65924959 is a prime.

It is a super-2 number, since 2×65924991² = 8692208876700162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65924993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 583351 + ... + 583463.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^65924991 is an apocalyptic number.

65924991 is a deficient number, since it is larger than the sum of its proper divisors (41632641).

65924991 is a wasteful number, since it uses less digits than its factorization.

65924991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 281 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 65924991 is about 8119.4206074079. The cubic root of 65924991 is about 403.9708483851.

The spelling of 65924991 in words is "sixty-five million, nine hundred twenty-four thousand, nine hundred ninety-one".