65426690 has 32 divisors (see below), whose sum is σ = 141678720. Its totient is φ = 21250944.

The previous prime is 65426687. The next prime is 65426707. The reversal of 65426690 is 9662456.

It is a super-2 number, since 2×65426690² = 8561303528712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23267 + ... + 25926.

It is an arithmetic number, because the mean of its divisors is an integer number (4427460).

Almost surely, 2^65426690 is an apocalyptic number.

65426690 is an abundant number, since it is smaller than the sum of its proper divisors (76252030).

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

65426690 is a wasteful number, since it uses less digits than its factorization.

65426690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49226.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 65426690 is about 8088.6766531986. The cubic root of 65426690 is about 402.9504543720.

The spelling of 65426690 in words is "sixty-five million, four hundred twenty-six thousand, six hundred ninety".