66201623874 has 24 divisors (see below), whose sum is σ = 148063848192. Its totient is φ = 21355362360.

The previous prime is 66201623869. The next prime is 66201623959. The reversal of 66201623874 is 47832610266.

66201623874 is a `hidden beast` number, since 6 + 6 + 201 + 62 + 387 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59319894 + ... + 59321009.

It is an arithmetic number, because the mean of its divisors is an integer number (6169327008).

Almost surely, 2^66201623874 is an apocalyptic number.

66201623874 is an abundant number, since it is smaller than the sum of its proper divisors (81862224318).

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

66201623874 is a wasteful number, since it uses less digits than its factorization.

66201623874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118640942 (or 118640939 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 66201623874 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, eight hundred seventy-four".