66680952 has 32 divisors (see below), whose sum is σ = 179526480. Its totient is φ = 20517120.

The previous prime is 66680951. The next prime is 66680959. The reversal of 66680952 is 25908666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66680951) 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, 106549 + ... + 107172.

Almost surely, 2^66680952 is an apocalyptic number.

It is an amenable number.

66680952 is an abundant number, since it is smaller than the sum of its proper divisors (112845528).

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

66680952 is a wasteful number, since it uses less digits than its factorization.

66680952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213743 (or 213739 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 66680952 is about 8165.8405568563. The cubic root of 66680952 is about 405.5090930641.

It can be divided in two parts, 666 and 80952, that added together give a palindrome (81618).

The spelling of 66680952 in words is "sixty-six million, six hundred eighty thousand, nine hundred fifty-two".