66712677476401 has 16 divisors (see below), whose sum is σ = 72842617693440. Its totient is φ = 60593612363280.

The previous prime is 66712677476399. The next prime is 66712677476477. The reversal of 66712677476401 is 10467477621766.

It is a cyclic number.

It is not a de Polignac number, because 66712677476401 - 2¹ = 66712677476399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66712677477401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80884450 + ... + 81705076.

It is an arithmetic number, because the mean of its divisors is an integer number (4552663605840).

Almost surely, 2^{66712677476401} is an apocalyptic number.

It is an amenable number.

66712677476401 is a deficient number, since it is larger than the sum of its proper divisors (6129940217039).

66712677476401 is a wasteful number, since it uses less digits than its factorization.

66712677476401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827244.

The product of its (nonzero) digits is 99574272, while the sum is 64.

The spelling of 66712677476401 in words is "sixty-six trillion, seven hundred twelve billion, six hundred seventy-seven million, four hundred seventy-six thousand, four hundred one".