68656190 has 16 divisors (see below), whose sum is σ = 126211392. Its totient is φ = 26877984.

The previous prime is 68656187. The next prime is 68656193. The reversal of 68656190 is 9165686.

It is an interprime number because it is at equal distance from previous prime (68656187) and next prime (68656193).

It is a super-2 number, since 2×68656190² = 9427344850632200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68656193) 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, 72569 + ... + 73508.

It is an arithmetic number, because the mean of its divisors is an integer number (7888212).

Almost surely, 2^68656190 is an apocalyptic number.

68656190 is a deficient number, since it is larger than the sum of its proper divisors (57555202).

68656190 is a wasteful number, since it uses less digits than its factorization.

68656190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146131.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 68656190 is about 8285.9030889819. The cubic root of 68656190 is about 409.4742219333.

The spelling of 68656190 in words is "sixty-eight million, six hundred fifty-six thousand, one hundred ninety".