331661610 has 192 divisors, whose sum is σ = 1052393472. Its totient is φ = 70823808.

The previous prime is 331661581. The next prime is 331661621. The reversal of 331661610 is 16166133.

It is a happy number.

331661610 is a `hidden beast` number, since 3 + 31 + 6 + 616 + 10 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 680787 + ... + 681273.

It is an arithmetic number, because the mean of its divisors is an integer number (5481216).

Almost surely, 2^331661610 is an apocalyptic number.

331661610 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 331661610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526196736).

331661610 is an abundant number, since it is smaller than the sum of its proper divisors (720731862).

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

331661610 is a wasteful number, since it uses less digits than its factorization.

331661610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 331661610 is about 18211.5790089712. The cubic root of 331661610 is about 692.2002230046.

The spelling of 331661610 in words is "three hundred thirty-one million, six hundred sixty-one thousand, six hundred ten".