66570661005 has 32 divisors (see below), whose sum is σ = 108026265600. Its totient is φ = 35001325632.

The previous prime is 66570660997. The next prime is 66570661013. The reversal of 66570661005 is 50016607566.

It is an interprime number because it is at equal distance from previous prime (66570660997) and next prime (66570661013).

It is not a de Polignac number, because 66570661005 - 2³ = 66570660997 is a prime.

It is a super-2 number, since 2×66570661005² (a number of 22 digits) contains 22 as substring.

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, 738292 + ... + 823538.

It is an arithmetic number, because the mean of its divisors is an integer number (3375820800).

Almost surely, 2^66570661005 is an apocalyptic number.

It is an amenable number.

66570661005 is a deficient number, since it is larger than the sum of its proper divisors (41455604595).

66570661005 is a wasteful number, since it uses less digits than its factorization.

66570661005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85993.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 66570661005 in words is "sixty-six billion, five hundred seventy million, six hundred sixty-one thousand, five".