6656670521740 has 48 divisors (see below), whose sum is σ = 14899324676544. Its totient is φ = 2489444352000.

The previous prime is 6656670521687. The next prime is 6656670521827. The reversal of 6656670521740 is 471250766566.

It is a happy number.

It is a super-2 number, since 2×6656670521740² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64777941 + ... + 64880620.

It is an arithmetic number, because the mean of its divisors is an integer number (310402597428).

Almost surely, 2^{6656670521740} is an apocalyptic number.

It is an amenable number.

6656670521740 is an abundant number, since it is smaller than the sum of its proper divisors (8242654154804).

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

6656670521740 is a wasteful number, since it uses less digits than its factorization.

6656670521740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129658738 (or 129658736 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 6656670521740 in words is "six trillion, six hundred fifty-six billion, six hundred seventy million, five hundred twenty-one thousand, seven hundred forty".