66925789 has 8 divisors (see below), whose sum is σ = 76550720. Its totient is φ = 57316896.

The previous prime is 66925769. The next prime is 66925799. The reversal of 66925789 is 98752966.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66925789 - 2⁵ = 66925757 is a prime.

It is a super-2 number, since 2×66925789² = 8958122466545042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66925769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6937 + ... + 13489.

It is an arithmetic number, because the mean of its divisors is an integer number (9568840).

Almost surely, 2^66925789 is an apocalyptic number.

It is an amenable number.

66925789 is a deficient number, since it is larger than the sum of its proper divisors (9624931).

66925789 is a wasteful number, since it uses less digits than its factorization.

66925789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8019.

The product of its digits is 1632960, while the sum is 52.

The square root of 66925789 is about 8180.8183575972. The cubic root of 66925789 is about 406.0047986523.

The spelling of 66925789 in words is "sixty-six million, nine hundred twenty-five thousand, seven hundred eighty-nine".