660252101 has 4 divisors (see below), whose sum is σ = 660379104. Its totient is φ = 660125100.

The previous prime is 660252097. The next prime is 660252169. The reversal of 660252101 is 101252066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660252101 - 2² = 660252097 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 (660252701) 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, 55355 + ... + 66216.

It is an arithmetic number, because the mean of its divisors is an integer number (165094776).

Almost surely, 2^660252101 is an apocalyptic number.

It is an amenable number.

660252101 is a deficient number, since it is larger than the sum of its proper divisors (127003).

660252101 is a wasteful number, since it uses less digits than its factorization.

660252101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127002.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 660252101 is about 25695.3711979415. The cubic root of 660252101 is about 870.7696105343.

The spelling of 660252101 in words is "six hundred sixty million, two hundred fifty-two thousand, one hundred one".