7662779980 has 24 divisors (see below), whose sum is σ = 16162736688. Its totient is φ = 3051607488.

The previous prime is 7662779953. The next prime is 7662779983. The reversal of 7662779980 is 899772667.

It is not an unprimeable number, because it can be changed into a prime (7662779983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839379 + ... + 848458.

It is an arithmetic number, because the mean of its divisors is an integer number (673447362).

Almost surely, 2^7662779980 is an apocalyptic number.

It is an amenable number.

7662779980 is an abundant number, since it is smaller than the sum of its proper divisors (8499956708).

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

7662779980 is a wasteful number, since it uses less digits than its factorization.

7662779980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688073 (or 1688071 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 61.

The square root of 7662779980 is about 87537.3062185489. The cubic root of 7662779980 is about 1971.4939649696.

The spelling of 7662779980 in words is "seven billion, six hundred sixty-two million, seven hundred seventy-nine thousand, nine hundred eighty".