1656766464 has 120 divisors (see below), whose sum is σ = 4542292608. Its totient is φ = 536739840.

The previous prime is 1656766459. The next prime is 1656766513. The reversal of 1656766464 is 4646676561.

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, 1818169 + ... + 1819079.

Almost surely, 2^1656766464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656766464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2271146304).

1656766464 is an abundant number, since it is smaller than the sum of its proper divisors (2885526144).

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

1656766464 is an frugal number, since it uses more digits than its factorization.

1656766464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 953 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The square root of 1656766464 is about 40703.3962219371. The cubic root of 1656766464 is about 1183.2788401188.

The spelling of 1656766464 in words is "one billion, six hundred fifty-six million, seven hundred sixty-six thousand, four hundred sixty-four".