7921161662 has 32 divisors (see below), whose sum is σ = 12651072480. Its totient is φ = 3706813440.

The previous prime is 7921161637. The next prime is 7921161683. The reversal of 7921161662 is 2661611297.

It is a congruent number.

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, 6402908 + ... + 6404144.

It is an arithmetic number, because the mean of its divisors is an integer number (395346015).

Almost surely, 2^7921161662 is an apocalyptic number.

7921161662 is a deficient number, since it is larger than the sum of its proper divisors (4729910818).

7921161662 is a wasteful number, since it uses less digits than its factorization.

7921161662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its digits is 54432, while the sum is 41.

The square root of 7921161662 is about 89000.9082088492. The cubic root of 7921161662 is about 1993.4084380216.

The spelling of 7921161662 in words is "seven billion, nine hundred twenty-one million, one hundred sixty-one thousand, six hundred sixty-two".