66672792 has 48 divisors (see below), whose sum is σ = 181278240. Its totient is φ = 22137408.

The previous prime is 66672787. The next prime is 66672797. The reversal of 66672792 is 29727666.

It is an interprime number because it is at equal distance from previous prime (66672787) and next prime (66672797).

It is a super-2 number, since 2×66672792² = 8890522386150528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18273 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (3776630).

Almost surely, 2^66672792 is an apocalyptic number.

It is an amenable number.

66672792 is an abundant number, since it is smaller than the sum of its proper divisors (114605448).

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

66672792 is a wasteful number, since it uses less digits than its factorization.

66672792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632 (or 3625 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 66672792 is about 8165.3408991909. The cubic root of 66672792 is about 405.4925511628.

The spelling of 66672792 in words is "sixty-six million, six hundred seventy-two thousand, seven hundred ninety-two".