66150061604 has 36 divisors (see below), whose sum is σ = 128053810332. Its totient is φ = 29876658240.

The previous prime is 66150061597. The next prime is 66150061619. The reversal of 66150061604 is 40616005166.

It can be written as a sum of positive squares in 2 ways, for example, as 41717245504 + 24432816100 = 204248^2 + 156310^2 .

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, 359279 + ... + 511254.

It is an arithmetic number, because the mean of its divisors is an integer number (3557050287).

Almost surely, 2^66150061604 is an apocalyptic number.

It is an amenable number.

66150061604 is a deficient number, since it is larger than the sum of its proper divisors (61903748728).

66150061604 is a wasteful number, since it uses less digits than its factorization.

66150061604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870716 (or 870703 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 66150061604 in words is "sixty-six billion, one hundred fifty million, sixty-one thousand, six hundred four".