70663656 has 64 divisors (see below), whose sum is σ = 203834880. Its totient is φ = 19995840.

The previous prime is 70663643. The next prime is 70663657. The reversal of 70663656 is 65636607.

It is not an unprimeable number, because it can be changed into a prime (70663657) 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, 16011 + ... + 19941.

It is an arithmetic number, because the mean of its divisors is an integer number (3184920).

Almost surely, 2^70663656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70663656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101917440).

70663656 is an abundant number, since it is smaller than the sum of its proper divisors (133171224).

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

70663656 is a wasteful number, since it uses less digits than its factorization.

70663656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4050 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 70663656 is about 8406.1677356570. The cubic root of 70663656 is about 413.4268715349.

The spelling of 70663656 in words is "seventy million, six hundred sixty-three thousand, six hundred fifty-six".