66426376664001 has 16 divisors (see below), whose sum is σ = 93242582877440. Its totient is φ = 41947839807120.

The previous prime is 66426376663937. The next prime is 66426376664009. The reversal of 66426376664001 is 10046667362466.

It is not a de Polignac number, because 66426376664001 - 2⁶ = 66426376663937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66426376664009) 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, 78202255 + ... + 79047108.

It is an arithmetic number, because the mean of its divisors is an integer number (5827661429840).

Almost surely, 2^{66426376664001} is an apocalyptic number.

It is an amenable number.

66426376664001 is a deficient number, since it is larger than the sum of its proper divisors (26816206213439).

66426376664001 is a wasteful number, since it uses less digits than its factorization.

66426376664001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157256796.

The product of its (nonzero) digits is 31352832, while the sum is 57.

The spelling of 66426376664001 in words is "sixty-six trillion, four hundred twenty-six billion, three hundred seventy-six million, six hundred sixty-four thousand, one".