665147461772 has 6 divisors (see below), whose sum is σ = 1164008058108. Its totient is φ = 332573730884.

The previous prime is 665147461729. The next prime is 665147461813. The reversal of 665147461772 is 277164741566.

It is a super-2 number, since 2×665147461772² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83143432718 + ... + 83143432725.

It is an arithmetic number, because the mean of its divisors is an integer number (194001343018).

Almost surely, 2^665147461772 is an apocalyptic number.

It is an amenable number.

665147461772 is a deficient number, since it is larger than the sum of its proper divisors (498860596336).

665147461772 is a wasteful number, since it uses less digits than its factorization.

665147461772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166286865447 (or 166286865445 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 56.

The spelling of 665147461772 in words is "six hundred sixty-five billion, one hundred forty-seven million, four hundred sixty-one thousand, seven hundred seventy-two".