66157460 has 12 divisors (see below), whose sum is σ = 138930708. Its totient is φ = 26462976.

The previous prime is 66157459. The next prime is 66157471. The reversal of 66157460 is 6475166.

It can be written as a sum of positive squares in 2 ways, for example, as 17073424 + 49084036 = 4132^2 + 7006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66157460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653917 + ... + 1653956.

It is an arithmetic number, because the mean of its divisors is an integer number (11577559).

Almost surely, 2^66157460 is an apocalyptic number.

It is an amenable number.

66157460 is an abundant number, since it is smaller than the sum of its proper divisors (72773248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66157460 is a wasteful number, since it uses less digits than its factorization.

66157460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307882 (or 3307880 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66157460 is about 8133.7236245154. The cubic root of 66157460 is about 404.4451274548.

The spelling of 66157460 in words is "sixty-six million, one hundred fifty-seven thousand, four hundred sixty".