66870937 has 32 divisors (see below), whose sum is σ = 84992000. Its totient is φ = 52390800.

The previous prime is 66870931. The next prime is 66870953. The reversal of 66870937 is 73907866.

It is not a de Polignac number, because 66870937 - 2³ = 66870929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66870931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201862 + ... + 202192.

It is an arithmetic number, because the mean of its divisors is an integer number (2656000).

Almost surely, 2^66870937 is an apocalyptic number.

It is an amenable number.

66870937 is a deficient number, since it is larger than the sum of its proper divisors (18121063).

66870937 is a wasteful number, since it uses less digits than its factorization.

66870937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 66870937 is about 8177.4651940562. The cubic root of 66870937 is about 405.8938485861.

It can be divided in two parts, 668709 and 37, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 66870937 in words is "sixty-six million, eight hundred seventy thousand, nine hundred thirty-seven".