661024704 has 56 divisors (see below), whose sum is σ = 1751492560. Its totient is φ = 220022784.

The previous prime is 661024703. The next prime is 661024711. The reversal of 661024704 is 407420166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661024703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157092 + ... + 161244.

Almost surely, 2^661024704 is an apocalyptic number.

661024704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

661024704 is an abundant number, since it is smaller than the sum of its proper divisors (1090467856).

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

661024704 is a wasteful number, since it uses less digits than its factorization.

661024704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997 (or 4987 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 661024704 is about 25710.4006969942. The cubic root of 661024704 is about 871.1091257841.

The spelling of 661024704 in words is "six hundred sixty-one million, twenty-four thousand, seven hundred four".