70505664 has 56 divisors (see below), whose sum is σ = 197528688. Its totient is φ = 22118400.

The previous prime is 70505657. The next prime is 70505671. The reversal of 70505664 is 46650507.

It is an interprime number because it is at equal distance from previous prime (70505657) and next prime (70505671).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7537 + ... + 14064.

It is an arithmetic number, because the mean of its divisors is an integer number (3527298).

Almost surely, 2^70505664 is an apocalyptic number.

It is an amenable number.

70505664 is an abundant number, since it is smaller than the sum of its proper divisors (127023024).

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

70505664 is a wasteful number, since it uses less digits than its factorization.

70505664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21633 (or 21623 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 70505664 is about 8396.7650913909. The cubic root of 70505664 is about 413.1185240634.

The spelling of 70505664 in words is "seventy million, five hundred five thousand, six hundred sixty-four".