7957666015 has 16 divisors (see below), whose sum is σ = 10534579776. Its totient is φ = 5733100800.

The previous prime is 7957666007. The next prime is 7957666019. The reversal of 7957666015 is 5106667597.

It is a happy number.

It is not a de Polignac number, because 7957666015 - 2³ = 7957666007 is a prime.

It is a super-3 number, since 3×7957666015³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7957666019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490331 + ... + 1495660.

It is an arithmetic number, because the mean of its divisors is an integer number (658411236).

Almost surely, 2^7957666015 is an apocalyptic number.

7957666015 is a deficient number, since it is larger than the sum of its proper divisors (2576913761).

7957666015 is a wasteful number, since it uses less digits than its factorization.

7957666015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986050.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The square root of 7957666015 is about 89205.7510197633. The cubic root of 7957666015 is about 1996.4659267581.

The spelling of 7957666015 in words is "seven billion, nine hundred fifty-seven million, six hundred sixty-six thousand, fifteen".