1664124740 has 48 divisors (see below), whose sum is σ = 3566384640. Its totient is φ = 652030080.

The previous prime is 1664124739. The next prime is 1664124751. The reversal of 1664124740 is 474214661.

It is a super-2 number, since 2×1664124740² = 5538622300560135200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1664124740.

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, 1100585 + ... + 1102095.

It is an arithmetic number, because the mean of its divisors is an integer number (74299680).

Almost surely, 2^1664124740 is an apocalyptic number.

1664124740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664124740 is an abundant number, since it is smaller than the sum of its proper divisors (1902259900).

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

1664124740 is a wasteful number, since it uses less digits than its factorization.

1664124740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612 (or 2610 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1664124740 is about 40793.6850505075. The cubic root of 1664124740 is about 1185.0280373410.

The spelling of 1664124740 in words is "one billion, six hundred sixty-four million, one hundred twenty-four thousand, seven hundred forty".