65707070 has 32 divisors (see below), whose sum is σ = 138952800. Its totient is φ = 22055040.

The previous prime is 65707049. The next prime is 65707123. The reversal of 65707070 is 7070756.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21545 + ... + 24404.

It is an arithmetic number, because the mean of its divisors is an integer number (4342275).

Almost surely, 2^65707070 is an apocalyptic number.

65707070 is an abundant number, since it is smaller than the sum of its proper divisors (73245730).

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

65707070 is a wasteful number, since it uses less digits than its factorization.

65707070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45980.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 65707070 is about 8105.9897606646. The cubic root of 65707070 is about 403.5252363362.

The spelling of 65707070 in words is "sixty-five million, seven hundred seven thousand, seventy".