701566661 has 4 divisors (see below), whose sum is σ = 702489324. Its totient is φ = 700644000.

The previous prime is 701566639. The next prime is 701566709. The reversal of 701566661 is 166665107.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59197636 + 642369025 = 7694^2 + 25345^2 .

It is a cyclic number.

It is not a de Polignac number, because 701566661 - 2⁶ = 701566597 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 (701566601) 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, 460190 + ... + 461711.

It is an arithmetic number, because the mean of its divisors is an integer number (175622331).

Almost surely, 2^701566661 is an apocalyptic number.

It is an amenable number.

701566661 is a deficient number, since it is larger than the sum of its proper divisors (922663).

701566661 is an equidigital number, since it uses as much as digits as its factorization.

701566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922662.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 701566661 is about 26487.1036732973. The cubic root of 701566661 is about 888.5659103617.

The spelling of 701566661 in words is "seven hundred one million, five hundred sixty-six thousand, six hundred sixty-one".