68663620 has 48 divisors (see below), whose sum is σ = 148091328. Its totient is φ = 26732160.

The previous prime is 68663599. The next prime is 68663627. The reversal of 68663620 is 2636686.

It is a self number, because there is not a number n which added to its sum of digits gives 68663620.

It is not an unprimeable number, because it can be changed into a prime (68663627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223507 + ... + 223813.

It is an arithmetic number, because the mean of its divisors is an integer number (3085236).

Almost surely, 2^68663620 is an apocalyptic number.

It is an amenable number.

68663620 is an abundant number, since it is smaller than the sum of its proper divisors (79427708).

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

68663620 is a wasteful number, since it uses less digits than its factorization.

68663620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 68663620 is about 8286.3514287049. The cubic root of 68663620 is about 409.4889925545.

The spelling of 68663620 in words is "sixty-eight million, six hundred sixty-three thousand, six hundred twenty".