661926012 has 48 divisors (see below), whose sum is σ = 1739265024. Its totient is φ = 194112000.

The previous prime is 661925987. The next prime is 661926037. The reversal of 661926012 is 210629166.

661926012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (661925987) and next prime (661926037).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76789 + ... + 84972.

It is an arithmetic number, because the mean of its divisors is an integer number (36234688).

Almost surely, 2^661926012 is an apocalyptic number.

661926012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

661926012 is an abundant number, since it is smaller than the sum of its proper divisors (1077339012).

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

661926012 is a wasteful number, since it uses less digits than its factorization.

661926012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161810 (or 161808 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 661926012 is about 25727.9228077200. The cubic root of 661926012 is about 871.5048654309.

The spelling of 661926012 in words is "six hundred sixty-one million, nine hundred twenty-six thousand, twelve".