66572154 has 24 divisors (see below), whose sum is σ = 157352832. Its totient is φ = 20173320.

The previous prime is 66572141. The next prime is 66572171. The reversal of 66572154 is 45127566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167914 + ... + 168309.

It is an arithmetic number, because the mean of its divisors is an integer number (6556368).

Almost surely, 2^66572154 is an apocalyptic number.

66572154 is an abundant number, since it is smaller than the sum of its proper divisors (90780678).

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

66572154 is a wasteful number, since it uses less digits than its factorization.

66572154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336242 (or 336239 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 66572154 is about 8159.1760613434. The cubic root of 66572154 is about 405.2884273733.

The spelling of 66572154 in words is "sixty-six million, five hundred seventy-two thousand, one hundred fifty-four".