376691666 has 8 divisors (see below), whose sum is σ = 608501964. Its totient is φ = 173857680.

The previous prime is 376691657. The next prime is 376691669. The reversal of 376691666 is 666196673.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 376554025 + 137641 = 19405^2 + 371^2 .

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

It is a super-2 number, since 2×376691666² = 283793222467711112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (376691669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7244045 + ... + 7244096.

Almost surely, 2^376691666 is an apocalyptic number.

376691666 is a deficient number, since it is larger than the sum of its proper divisors (231810298).

376691666 is a wasteful number, since it uses less digits than its factorization.

376691666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14488156.

The product of its digits is 1469664, while the sum is 50.

The square root of 376691666 is about 19408.5462103683. The cubic root of 376691666 is about 722.2075162590.

The spelling of 376691666 in words is "three hundred seventy-six million, six hundred ninety-one thousand, six hundred sixty-six".