70640756 has 6 divisors (see below), whose sum is σ = 123621330. Its totient is φ = 35320376.

The previous prime is 70640753. The next prime is 70640767. The reversal of 70640756 is 65704607.

It can be written as a sum of positive squares in only one way, i.e., 55741156 + 14899600 = 7466^2 + 3860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70640753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8830091 + ... + 8830098.

It is an arithmetic number, because the mean of its divisors is an integer number (20603555).

Almost surely, 2^70640756 is an apocalyptic number.

It is an amenable number.

70640756 is a deficient number, since it is larger than the sum of its proper divisors (52980574).

70640756 is a wasteful number, since it uses less digits than its factorization.

70640756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17660193 (or 17660191 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 70640756 is about 8404.8055301714. The cubic root of 70640756 is about 413.3822069044.

The spelling of 70640756 in words is "seventy million, six hundred forty thousand, seven hundred fifty-six".