7661618764 has 12 divisors (see below), whose sum is σ = 13577552800. Its totient is φ = 3782317968.

The previous prime is 7661618761. The next prime is 7661618777. The reversal of 7661618764 is 4678161667.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7661618761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12122499 + ... + 12123130.

Almost surely, 2^7661618764 is an apocalyptic number.

It is an amenable number.

7661618764 is a deficient number, since it is larger than the sum of its proper divisors (5915934036).

7661618764 is a wasteful number, since it uses less digits than its factorization.

7661618764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24245712 (or 24245710 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 7661618764 is about 87530.6732751440. The cubic root of 7661618764 is about 1971.3943733508.

The spelling of 7661618764 in words is "seven billion, six hundred sixty-one million, six hundred eighteen thousand, seven hundred sixty-four".