664997962 has 16 divisors (see below), whose sum is σ = 1005973920. Its totient is φ = 329679792.

The previous prime is 664997951. The next prime is 664997989. The reversal of 664997962 is 269799466.

It is a junction number, because it is equal to n+sod(n) for n = 664997897 and 664997906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411468 + ... + 413080.

It is an arithmetic number, because the mean of its divisors is an integer number (62873370).

Almost surely, 2^664997962 is an apocalyptic number.

664997962 is a deficient number, since it is larger than the sum of its proper divisors (340975958).

664997962 is a wasteful number, since it uses less digits than its factorization.

664997962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237.

The product of its digits is 8817984, while the sum is 58.

The square root of 664997962 is about 25787.5544012999. The cubic root of 664997962 is about 872.8509818525.

The spelling of 664997962 in words is "six hundred sixty-four million, nine hundred ninety-seven thousand, nine hundred sixty-two".