660621151 has 8 divisors (see below), whose sum is σ = 681282000. Its totient is φ = 640176960.

The previous prime is 660621149. The next prime is 660621161. The reversal of 660621151 is 151126066.

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 660621151 - 2¹ = 660621149 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 (660621121) 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, 47961 + ... + 60178.

It is an arithmetic number, because the mean of its divisors is an integer number (85160250).

Almost surely, 2^660621151 is an apocalyptic number.

660621151 is a deficient number, since it is larger than the sum of its proper divisors (20660849).

660621151 is a wasteful number, since it uses less digits than its factorization.

660621151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108329.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 660621151 is about 25702.5514492239. The cubic root of 660621151 is about 870.9318201248.

The spelling of 660621151 in words is "six hundred sixty million, six hundred twenty-one thousand, one hundred fifty-one".