6665120464 has 10 divisors (see below), whose sum is σ = 12913670930. Its totient is φ = 3332560224.

The previous prime is 6665120383. The next prime is 6665120477. The reversal of 6665120464 is 4640215666.

It can be written as a sum of positive squares in only one way, i.e., 6629216400 + 35904064 = 81420^2 + 5992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208284999 + ... + 208285030.

It is an arithmetic number, because the mean of its divisors is an integer number (1291367093).

Almost surely, 2^6665120464 is an apocalyptic number.

It is an amenable number.

6665120464 is a deficient number, since it is larger than the sum of its proper divisors (6248550466).

6665120464 is a wasteful number, since it uses less digits than its factorization.

6665120464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416570037 (or 416570031 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 6665120464 is about 81640.1890247689. The cubic root of 6665120464 is about 1881.9265432700.

The spelling of 6665120464 in words is "six billion, six hundred sixty-five million, one hundred twenty thousand, four hundred sixty-four".