1660632408 has 64 divisors (see below), whose sum is σ = 4691088000. Its totient is φ = 544157856.

The previous prime is 1660632383. The next prime is 1660632443. The reversal of 1660632408 is 8042360661.

1660632408 is a `hidden beast` number, since 1 + 6 + 606 + 3 + 2 + 40 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 52410 + ... + 77897.

It is an arithmetic number, because the mean of its divisors is an integer number (73298250).

Almost surely, 2^1660632408 is an apocalyptic number.

1660632408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1660632408 is an abundant number, since it is smaller than the sum of its proper divisors (3030455592).

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

1660632408 is a wasteful number, since it uses less digits than its factorization.

1660632408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130381 (or 130371 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1660632408 is about 40750.8577578436. The cubic root of 1660632408 is about 1184.1984902037.

The spelling of 1660632408 in words is "one billion, six hundred sixty million, six hundred thirty-two thousand, four hundred eight".