65157668 has 24 divisors (see below), whose sum is σ = 121006872. Its totient is φ = 30593024.

The previous prime is 65157667. The next prime is 65157709. The reversal of 65157668 is 86675156.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 65157184 = 22^2 + 8072^2 .

It is not an unprimeable number, because it can be changed into a prime (65157667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41180 + ... + 42732.

It is an arithmetic number, because the mean of its divisors is an integer number (5041953).

Almost surely, 2^65157668 is an apocalyptic number.

65157668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

65157668 is a deficient number, since it is larger than the sum of its proper divisors (55849204).

65157668 is a wasteful number, since it uses less digits than its factorization.

65157668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2189 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 65157668 is about 8072.0299801227. The cubic root of 65157668 is about 402.3974106815.

The spelling of 65157668 in words is "sixty-five million, one hundred fifty-seven thousand, six hundred sixty-eight".