66426045816 has 64 divisors (see below), whose sum is σ = 185006253600. Its totient is φ = 19733995008.

The previous prime is 66426045799. The next prime is 66426045841. The reversal of 66426045816 is 61854062466.

It is a super-2 number, since 2×66426045816² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 3661711 + ... + 3679806.

Almost surely, 2^66426045816 is an apocalyptic number.

It is an amenable number.

66426045816 is an abundant number, since it is smaller than the sum of its proper divisors (118580207784).

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

66426045816 is a wasteful number, since it uses less digits than its factorization.

66426045816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7341568 (or 7341564 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 66426045816 in words is "sixty-six billion, four hundred twenty-six million, forty-five thousand, eight hundred sixteen".