661333414 has 32 divisors (see below), whose sum is σ = 1144705536. Its totient is φ = 280696320.

The previous prime is 661333373. The next prime is 661333423. The reversal of 661333414 is 414333166.

It is a happy number.

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, 839929 + ... + 840715.

It is an arithmetic number, because the mean of its divisors is an integer number (35772048).

Almost surely, 2^661333414 is an apocalyptic number.

661333414 is a deficient number, since it is larger than the sum of its proper divisors (483372122).

661333414 is a wasteful number, since it uses less digits than its factorization.

661333414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its digits is 15552, while the sum is 31.

The square root of 661333414 is about 25716.4035977039. The cubic root of 661333414 is about 871.2447123686.

The spelling of 661333414 in words is "six hundred sixty-one million, three hundred thirty-three thousand, four hundred fourteen".