66775070 has 16 divisors (see below), whose sum is σ = 120331440. Its totient is φ = 26679744.

The previous prime is 66775067. The next prime is 66775073. The reversal of 66775070 is 7057766.

It is an interprime number because it is at equal distance from previous prime (66775067) and next prime (66775073).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66775073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6914 + ... + 13466.

It is an arithmetic number, because the mean of its divisors is an integer number (7520715).

Almost surely, 2^66775070 is an apocalyptic number.

66775070 is a deficient number, since it is larger than the sum of its proper divisors (53556370).

66775070 is a wasteful number, since it uses less digits than its factorization.

66775070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579.

The product of its (nonzero) digits is 61740, while the sum is 38.

The square root of 66775070 is about 8171.6014342355. The cubic root of 66775070 is about 405.6997910130.

The spelling of 66775070 in words is "sixty-six million, seven hundred seventy-five thousand, seventy".