66767070 has 16 divisors (see below), whose sum is σ = 160241040. Its totient is φ = 17804544.

The previous prime is 66767069. The next prime is 66767111. The reversal of 66767070 is 7076766.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1112755 + ... + 1112814.

It is an arithmetic number, because the mean of its divisors is an integer number (10015065).

Almost surely, 2^66767070 is an apocalyptic number.

66767070 is an abundant number, since it is smaller than the sum of its proper divisors (93473970).

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

66767070 is a wasteful number, since it uses less digits than its factorization.

66767070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225579.

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 66767070 is about 8171.1119194391. Note that the first 3 decimals coincide. The cubic root of 66767070 is about 405.6835887190.

The spelling of 66767070 in words is "sixty-six million, seven hundred sixty-seven thousand, seventy".