661160701 has 4 divisors (see below), whose sum is σ = 662261404. Its totient is φ = 660060000.

The previous prime is 661160683. The next prime is 661160707. The reversal of 661160701 is 107061166.

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 453051225 + 208109476 = 21285^2 + 14426^2 .

It is a cyclic number.

It is not a de Polignac number, because 661160701 - 2⁹ = 661160189 is a prime.

It is a super-2 number, since 2×661160701² = 874266945093622802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 661160701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661160707) 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, 549450 + ... + 550651.

It is an arithmetic number, because the mean of its divisors is an integer number (165565351).

Almost surely, 2^661160701 is an apocalyptic number.

It is an amenable number.

661160701 is a deficient number, since it is larger than the sum of its proper divisors (1100703).

661160701 is a wasteful number, since it uses less digits than its factorization.

661160701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100702.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 661160701 is about 25713.0453466718. The cubic root of 661160701 is about 871.1688613752.

The spelling of 661160701 in words is "six hundred sixty-one million, one hundred sixty thousand, seven hundred one".