665651055147 has 8 divisors (see below), whose sum is σ = 955806643344. Its totient is φ = 409631418528.

The previous prime is 665651055079. The next prime is 665651055151. The reversal of 665651055147 is 741550156566.

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

It is not a de Polignac number, because 665651055147 - 2¹⁹ = 665650530859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665651055147.

It is not an unprimeable number, because it can be changed into a prime (665651055547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8533987848 + ... + 8533987925.

It is an arithmetic number, because the mean of its divisors is an integer number (119475830418).

Almost surely, 2^665651055147 is an apocalyptic number.

665651055147 is a deficient number, since it is larger than the sum of its proper divisors (290155588197).

665651055147 is a wasteful number, since it uses less digits than its factorization.

665651055147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17067975789.

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 665651055147 in words is "six hundred sixty-five billion, six hundred fifty-one million, fifty-five thousand, one hundred forty-seven".