66650157 has 24 divisors (see below), whose sum is σ = 115818560. Its totient is φ = 36080640.

The previous prime is 66650147. The next prime is 66650161. The reversal of 66650157 is 75105666.

It is a happy number.

It is not a de Polignac number, because 66650157 - 2⁴ = 66650141 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 (66650137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26644 + ... + 29037.

Almost surely, 2^66650157 is an apocalyptic number.

It is an amenable number.

66650157 is a deficient number, since it is larger than the sum of its proper divisors (49168403).

66650157 is a wasteful number, since it uses less digits than its factorization.

66650157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55713 (or 55710 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 66650157 is about 8163.9547401979. The cubic root of 66650157 is about 405.4466585656.

The spelling of 66650157 in words is "sixty-six million, six hundred fifty thousand, one hundred fifty-seven".