661512633262 has 96 divisors (see below), whose sum is σ = 1124884889856. Its totient is φ = 289727539200.

The previous prime is 661512633247. The next prime is 661512633307. The reversal of 661512633262 is 262336215166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1000775212 + ... + 1000775872.

It is an arithmetic number, because the mean of its divisors is an integer number (11717550936).

Almost surely, 2^661512633262 is an apocalyptic number.

661512633262 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

661512633262 is a deficient number, since it is larger than the sum of its proper divisors (463372256594).

661512633262 is a wasteful number, since it uses less digits than its factorization.

661512633262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1013 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The spelling of 661512633262 in words is "six hundred sixty-one billion, five hundred twelve million, six hundred thirty-three thousand, two hundred sixty-two".