70399660 has 12 divisors (see below), whose sum is σ = 147839328. Its totient is φ = 28159856.

The previous prime is 70399657. The next prime is 70399661. The reversal of 70399660 is 6699307.

It is a super-2 number, since 2×70399660² = 9912224256231200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70399661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759972 + ... + 1760011.

It is an arithmetic number, because the mean of its divisors is an integer number (12319944).

Almost surely, 2^70399660 is an apocalyptic number.

It is an amenable number.

70399660 is an abundant number, since it is smaller than the sum of its proper divisors (77439668).

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

70399660 is a wasteful number, since it uses less digits than its factorization.

70399660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519992 (or 3519990 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 70399660 is about 8390.4505242567. The cubic root of 70399660 is about 412.9113814556.

The spelling of 70399660 in words is "seventy million, three hundred ninety-nine thousand, six hundred sixty".