7665551972 has 24 divisors (see below), whose sum is σ = 14449107456. Its totient is φ = 3537337248.

The previous prime is 7665551969. The next prime is 7665551989. The reversal of 7665551972 is 2791555667.

It is a happy number.

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, 457853 + ... + 474299.

It is an arithmetic number, because the mean of its divisors is an integer number (602046144).

Almost surely, 2^7665551972 is an apocalyptic number.

It is an amenable number.

7665551972 is a deficient number, since it is larger than the sum of its proper divisors (6783555484).

7665551972 is a wasteful number, since it uses less digits than its factorization.

7665551972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25427 (or 25425 counting only the distinct ones).

The product of its digits is 3969000, while the sum is 53.

The square root of 7665551972 is about 87553.1379905940. The cubic root of 7665551972 is about 1971.7316640234.

The spelling of 7665551972 in words is "seven billion, six hundred sixty-five million, five hundred fifty-one thousand, nine hundred seventy-two".