66611457 has 64 divisors (see below), whose sum is σ = 116121600. Its totient is φ = 37290240.

The previous prime is 66611443. The next prime is 66611483. The reversal of 66611457 is 75411666.

It is not a de Polignac number, because 66611457 - 2⁸ = 66611201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66611437) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398788 + ... + 398954.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^66611457 is an apocalyptic number.

It is an amenable number.

66611457 is a deficient number, since it is larger than the sum of its proper divisors (49510143).

66611457 is a wasteful number, since it uses less digits than its factorization.

66611457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 277 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 66611457 is about 8161.5842212159. The cubic root of 66611457 is about 405.3681700104.

It can be divided in two parts, 6661 and 1457, that added together give a palindrome (8118).

The spelling of 66611457 in words is "sixty-six million, six hundred eleven thousand, four hundred fifty-seven".