66745614 has 16 divisors (see below), whose sum is σ = 143759952. Its totient is φ = 20537088.

The previous prime is 66745607. The next prime is 66745631. The reversal of 66745614 is 41654766.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427779 + ... + 427934.

It is an arithmetic number, because the mean of its divisors is an integer number (8984997).

Almost surely, 2^66745614 is an apocalyptic number.

66745614 is an abundant number, since it is smaller than the sum of its proper divisors (77014338).

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

66745614 is a wasteful number, since it uses less digits than its factorization.

66745614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855731.

The product of its digits is 120960, while the sum is 39.

The square root of 66745614 is about 8169.7988959337. The cubic root of 66745614 is about 405.6401277752.

The spelling of 66745614 in words is "sixty-six million, seven hundred forty-five thousand, six hundred fourteen".