66652157 has 24 divisors (see below), whose sum is σ = 80385312. Its totient is φ = 54482400.

The previous prime is 66652147. The next prime is 66652177. The reversal of 66652157 is 75125666.

It is not a de Polignac number, because 66652157 - 2⁴ = 66652141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66652157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652127) 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, 315782 + ... + 315992.

It is an arithmetic number, because the mean of its divisors is an integer number (3349388).

Almost surely, 2^66652157 is an apocalyptic number.

It is an amenable number.

66652157 is a deficient number, since it is larger than the sum of its proper divisors (13733155).

66652157 is a wasteful number, since it uses less digits than its factorization.

66652157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 282 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 66652157 is about 8164.0772289341. The cubic root of 66652157 is about 405.4507139960.

The spelling of 66652157 in words is "sixty-six million, six hundred fifty-two thousand, one hundred fifty-seven".