373566661 has 8 divisors (see below), whose sum is σ = 416175480. Its totient is φ = 332939712.

The previous prime is 373566659. The next prime is 373566673. The reversal of 373566661 is 166665373.

It can be written as a sum of positive squares in 4 ways, for example, as 67141636 + 306425025 = 8194^2 + 17505^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 373566661 - 2¹ = 373566659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (373576661) 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, 495070 + ... + 495823.

It is an arithmetic number, because the mean of its divisors is an integer number (52021935).

Almost surely, 2^373566661 is an apocalyptic number.

It is an amenable number.

373566661 is a deficient number, since it is larger than the sum of its proper divisors (42608819).

373566661 is a wasteful number, since it uses less digits than its factorization.

373566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990935.

The product of its digits is 408240, while the sum is 43.

The square root of 373566661 is about 19327.8726454827. The cubic root of 373566661 is about 720.2048420507.

The spelling of 373566661 in words is "three hundred seventy-three million, five hundred sixty-six thousand, six hundred sixty-one".