666115051 has 8 divisors (see below), whose sum is σ = 762513120. Its totient is φ = 570026688.

The previous prime is 666115031. The next prime is 666115057. The reversal of 666115051 is 150511666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666115051 - 2¹¹ = 666113003 is a prime.

It is a super-2 number, since 2×666115051² = 887418522337465202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666115057) 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, 72796 + ... + 81433.

It is an arithmetic number, because the mean of its divisors is an integer number (95314140).

Almost surely, 2^666115051 is an apocalyptic number.

666115051 is a deficient number, since it is larger than the sum of its proper divisors (96398069).

666115051 is a wasteful number, since it uses less digits than its factorization.

666115051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154853.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 666115051 is about 25809.2047727163. The cubic root of 666115051 is about 873.3394579173.

It can be divided in two parts, 6661 and 15051, that added together give a palindrome (21712).

The spelling of 666115051 in words is "six hundred sixty-six million, one hundred fifteen thousand, fifty-one".