660157417 has 4 divisors (see below), whose sum is σ = 668513920. Its totient is φ = 651800916.

The previous prime is 660157403. The next prime is 660157423. The reversal of 660157417 is 714751066.

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 660157417 - 2²³ = 651768809 is a prime.

It is a super-2 number, since 2×660157417² = 871615630440223778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660157427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4178133 + ... + 4178290.

It is an arithmetic number, because the mean of its divisors is an integer number (167128480).

Almost surely, 2^660157417 is an apocalyptic number.

It is an amenable number.

660157417 is a deficient number, since it is larger than the sum of its proper divisors (8356503).

660157417 is an equidigital number, since it uses as much as digits as its factorization.

660157417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356502.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 660157417 is about 25693.5286988767. The cubic root of 660157417 is about 870.7279840651.

The spelling of 660157417 in words is "six hundred sixty million, one hundred fifty-seven thousand, four hundred seventeen".