66798725 has 12 divisors (see below), whose sum is σ = 94663584. Its totient is φ = 45804720.

The previous prime is 66798701. The next prime is 66798731. The reversal of 66798725 is 52789766.

It is not a de Polignac number, because 66798725 - 2⁸ = 66798469 is a prime.

It is a Duffinian number.

It is a congruent 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, 190679 + ... + 191028.

It is an arithmetic number, because the mean of its divisors is an integer number (7888632).

Almost surely, 2^66798725 is an apocalyptic number.

It is an amenable number.

66798725 is a deficient number, since it is larger than the sum of its proper divisors (27864859).

66798725 is a wasteful number, since it uses less digits than its factorization.

66798725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381724 (or 381719 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 50.

The square root of 66798725 is about 8173.0486967838. The cubic root of 66798725 is about 405.7476916021.

The spelling of 66798725 in words is "sixty-six million, seven hundred ninety-eight thousand, seven hundred twenty-five".