66215015954 has 8 divisors (see below), whose sum is σ = 101005956720. Its totient is φ = 32546363716.

The previous prime is 66215015953. The next prime is 66215015981. The reversal of 66215015954 is 45951051266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66215015953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280571984 + ... + 280572219.

It is an arithmetic number, because the mean of its divisors is an integer number (12625744590).

Almost surely, 2^66215015954 is an apocalyptic number.

66215015954 is a deficient number, since it is larger than the sum of its proper divisors (34790940766).

66215015954 is a wasteful number, since it uses less digits than its factorization.

66215015954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561144264.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 66215015954 in words is "sixty-six billion, two hundred fifteen million, fifteen thousand, nine hundred fifty-four".