70665939 has 10 divisors (see below), whose sum is σ = 105562820. Its totient is φ = 47110572.

The previous prime is 70665853. The next prime is 70665941. The reversal of 70665939 is 93956607.

It is not a de Polignac number, because 70665939 - 2¹¹ = 70663891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70665894 and 70665903.

It is not an unprimeable number, because it can be changed into a prime (70665139) 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 in 9 ways as a sum of consecutive naturals, for example, 436129 + ... + 436290.

It is an arithmetic number, because the mean of its divisors is an integer number (10556282).

Almost surely, 2^70665939 is an apocalyptic number.

70665939 is a deficient number, since it is larger than the sum of its proper divisors (34896881).

70665939 is an equidigital number, since it uses as much as digits as its factorization.

70665939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872431 (or 872422 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 70665939 is about 8406.3035277106. The cubic root of 70665939 is about 413.4313238160.

The spelling of 70665939 in words is "seventy million, six hundred sixty-five thousand, nine hundred thirty-nine".