7961009660 has 12 divisors (see below), whose sum is σ = 16718120328. Its totient is φ = 3184403856.

The previous prime is 7961009597. The next prime is 7961009663. The reversal of 7961009660 is 669001697.

It is a happy number.

It is a super-2 number, since 2×7961009660² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7961009663) 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, 199025222 + ... + 199025261.

It is an arithmetic number, because the mean of its divisors is an integer number (1393176694).

Almost surely, 2^7961009660 is an apocalyptic number.

It is an amenable number.

7961009660 is an abundant number, since it is smaller than the sum of its proper divisors (8757110668).

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

7961009660 is a wasteful number, since it uses less digits than its factorization.

7961009660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398050492 (or 398050490 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 7961009660 is about 89224.4902479134. The cubic root of 7961009660 is about 1996.7455120266.

The spelling of 7961009660 in words is "seven billion, nine hundred sixty-one million, nine thousand, six hundred sixty".