66965157 has 16 divisors (see below), whose sum is σ = 113380480. Its totient is φ = 38265696.

The previous prime is 66965137. The next prime is 66965179. The reversal of 66965157 is 75156966.

It is not a de Polignac number, because 66965157 - 2¹⁴ = 66948773 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 (66965117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176968 + ... + 177345.

It is an arithmetic number, because the mean of its divisors is an integer number (7086280).

Almost surely, 2^66965157 is an apocalyptic number.

It is an amenable number.

66965157 is a deficient number, since it is larger than the sum of its proper divisors (46415323).

66965157 is a wasteful number, since it uses less digits than its factorization.

66965157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354329 (or 354323 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 66965157 is about 8183.2241201130. The cubic root of 66965157 is about 406.0843916072.

The spelling of 66965157 in words is "sixty-six million, nine hundred sixty-five thousand, one hundred fifty-seven".