66500070 has 64 divisors (see below), whose sum is σ = 196439040. Its totient is φ = 14030208.

The previous prime is 66500069. The next prime is 66500081. The reversal of 66500070 is 7000566.

It is a self number, because there is not a number n which added to its sum of digits gives 66500070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9450 + ... + 14909.

It is an arithmetic number, because the mean of its divisors is an integer number (3069360).

Almost surely, 2^66500070 is an apocalyptic number.

66500070 is an abundant number, since it is smaller than the sum of its proper divisors (129938970).

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

66500070 is a wasteful number, since it uses less digits than its factorization.

66500070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24389.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 66500070 is about 8154.7575071243. The cubic root of 66500070 is about 405.1420931072.

The spelling of 66500070 in words is "sixty-six million, five hundred thousand, seventy".