66120204476930 has 16 divisors (see below), whose sum is σ = 119023858832760. Its totient is φ = 26446417174272.

The previous prime is 66120204476927. The next prime is 66120204476939. The reversal of 66120204476930 is 3967440202166.

It can be written as a sum of positive squares in 4 ways, for example, as 61415951469889 + 4704253007041 = 7836833^2 + 2168929^2 .

It is not an unprimeable number, because it can be changed into a prime (66120204476939) 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, 207910229 + ... + 208228008.

Almost surely, 2^{66120204476930} is an apocalyptic number.

66120204476930 is a deficient number, since it is larger than the sum of its proper divisors (52903654355830).

66120204476930 is a wasteful number, since it uses less digits than its factorization.

66120204476930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416154133.

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 66120204476930 in words is "sixty-six trillion, one hundred twenty billion, two hundred four million, four hundred seventy-six thousand, nine hundred thirty".