6657000157 has 4 divisors (see below), whose sum is σ = 6658574076. Its totient is φ = 6655426240.

The previous prime is 6657000073. The next prime is 6657000167. The reversal of 6657000157 is 7510007566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7510007566 = 2 ⋅3755003783.

It can be written as a sum of positive squares in 2 ways, for example, as 6474777156 + 182223001 = 80466^2 + 13499^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657000157 - 2¹¹ = 6656998109 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 (6657000167) 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, 780598 + ... + 789079.

It is an arithmetic number, because the mean of its divisors is an integer number (1664643519).

Almost surely, 2^6657000157 is an apocalyptic number.

It is an amenable number.

6657000157 is a deficient number, since it is larger than the sum of its proper divisors (1573919).

6657000157 is a wasteful number, since it uses less digits than its factorization.

6657000157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573918.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 6657000157 is about 81590.4415786555. The cubic root of 6657000157 is about 1881.1619643619.

The spelling of 6657000157 in words is "six billion, six hundred fifty-seven million, one hundred fifty-seven", and thus it is an aban number.