666270715 has 48 divisors (see below), whose sum is σ = 935794944. Its totient is φ = 451520000.

The previous prime is 666270707. The next prime is 666270719. The reversal of 666270715 is 517072666.

It is a happy number.

It is not a de Polignac number, because 666270715 - 2³ = 666270707 is a prime.

It is a super-2 number, since 2×666270715² = 887833331333222450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666270719) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2654340 + ... + 2654590.

It is an arithmetic number, because the mean of its divisors is an integer number (19495728).

Almost surely, 2^666270715 is an apocalyptic number.

666270715 is a deficient number, since it is larger than the sum of its proper divisors (269524229).

666270715 is a wasteful number, since it uses less digits than its factorization.

666270715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 666270715 is about 25812.2202648281. The cubic root of 666270715 is about 873.4074826650.

It can be divided in two parts, 6662 and 70715, that added together give a palindrome (77377).

The spelling of 666270715 in words is "six hundred sixty-six million, two hundred seventy thousand, seven hundred fifteen".