68667690 has 64 divisors (see below), whose sum is σ = 202841856. Its totient is φ = 14487552.

The previous prime is 68667631. The next prime is 68667707. The reversal of 68667690 is 9676686.

It is a happy number.

It is a super-2 number, since 2×68667690² = 9430503299872200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9847 + ... + 15306.

It is an arithmetic number, because the mean of its divisors is an integer number (3169404).

Almost surely, 2^68667690 is an apocalyptic number.

68667690 is an abundant number, since it is smaller than the sum of its proper divisors (134174166).

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

68667690 is a wasteful number, since it uses less digits than its factorization.

68667690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25183.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 68667690 is about 8286.5970096295. The cubic root of 68667690 is about 409.4970831430.

The spelling of 68667690 in words is "sixty-eight million, six hundred sixty-seven thousand, six hundred ninety".