661925146 has 8 divisors (see below), whose sum is σ = 997593984. Its totient is φ = 329393820.

The previous prime is 661925023. The next prime is 661925167. The reversal of 661925146 is 641529166.

It is a happy number.

661925146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 661925099 and 661925108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783850 + ... + 784693.

It is an arithmetic number, because the mean of its divisors is an integer number (124699248).

Almost surely, 2^661925146 is an apocalyptic number.

661925146 is a deficient number, since it is larger than the sum of its proper divisors (335668838).

661925146 is a wasteful number, since it uses less digits than its factorization.

661925146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568756.

The product of its digits is 77760, while the sum is 40.

The square root of 661925146 is about 25727.9059777511. The cubic root of 661925146 is about 871.5044853665.

The spelling of 661925146 in words is "six hundred sixty-one million, nine hundred twenty-five thousand, one hundred forty-six".