66405626013016 has 16 divisors (see below), whose sum is σ = 124510753167840. Its totient is φ = 33202758501600.

The previous prime is 66405626012939. The next prime is 66405626013029. The reversal of 66405626013016 is 61031062650466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380331 + ... + 11606746.

It is an arithmetic number, because the mean of its divisors is an integer number (7781922072990).

Almost surely, 2^{66405626013016} is an apocalyptic number.

It is an amenable number.

66405626013016 is a deficient number, since it is larger than the sum of its proper divisors (58105127154824).

66405626013016 is a wasteful number, since it uses less digits than its factorization.

66405626013016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626234 (or 13626230 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 66405626013016 in words is "sixty-six trillion, four hundred five billion, six hundred twenty-six million, thirteen thousand, sixteen".