661602472 has 16 divisors (see below), whose sum is σ = 1269354240. Its totient is φ = 323108016.

The previous prime is 661602467. The next prime is 661602479. The reversal of 661602472 is 274206166.

It is not an unprimeable number, because it can be changed into a prime (661602479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961288 + ... + 961975.

It is an arithmetic number, because the mean of its divisors is an integer number (79334640).

Almost surely, 2^661602472 is an apocalyptic number.

It is an amenable number.

661602472 is a deficient number, since it is larger than the sum of its proper divisors (607751768).

661602472 is a wasteful number, since it uses less digits than its factorization.

661602472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923312 (or 1923308 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 661602472 is about 25721.6343182155. The cubic root of 661602472 is about 871.3628492378.

The spelling of 661602472 in words is "six hundred sixty-one million, six hundred two thousand, four hundred seventy-two".