1660237664 has 12 divisors (see below), whose sum is σ = 3268592964. Its totient is φ = 830118816.

The previous prime is 1660237633. The next prime is 1660237687. The reversal of 1660237664 is 4667320661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25941182 + ... + 25941245.

It is an arithmetic number, because the mean of its divisors is an integer number (272382747).

Almost surely, 2^1660237664 is an apocalyptic number.

It is an amenable number.

1660237664 is a deficient number, since it is larger than the sum of its proper divisors (1608355300).

1660237664 is an equidigital number, since it uses as much as digits as its factorization.

1660237664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51882437 (or 51882429 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 1660237664 is about 40746.0140872699. The cubic root of 1660237664 is about 1184.1046519988.

The spelling of 1660237664 in words is "one billion, six hundred sixty million, two hundred thirty-seven thousand, six hundred sixty-four".