661111224670 has 64 divisors (see below), whose sum is σ = 1347466627584. Its totient is φ = 231706949760.

The previous prime is 661111224667. The next prime is 661111224689. The reversal of 661111224670 is 76422111166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452232 + ... + 1235611.

It is an arithmetic number, because the mean of its divisors is an integer number (21054166056).

Almost surely, 2^661111224670 is an apocalyptic number.

661111224670 is an abundant number, since it is smaller than the sum of its proper divisors (686355402914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661111224670 is a wasteful number, since it uses less digits than its factorization.

661111224670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688017.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 661111224670 in words is "six hundred sixty-one billion, one hundred eleven million, two hundred twenty-four thousand, six hundred seventy".