68656402 has 4 divisors (see below), whose sum is σ = 102984606. Its totient is φ = 34328200.

The previous prime is 68656391. The next prime is 68656417. The reversal of 68656402 is 20465686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49829481 + 18826921 = 7059^2 + 4339^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17164099 + ... + 17164102.

Almost surely, 2^68656402 is an apocalyptic number.

68656402 is a deficient number, since it is larger than the sum of its proper divisors (34328204).

68656402 is a wasteful number, since it uses less digits than its factorization.

68656402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34328203.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 68656402 is about 8285.9158817840. The cubic root of 68656402 is about 409.4746433979.

The spelling of 68656402 in words is "sixty-eight million, six hundred fifty-six thousand, four hundred two".