66274780 has 48 divisors (see below), whose sum is σ = 163515744. Its totient is φ = 22245120.

The previous prime is 66274723. The next prime is 66274787. The reversal of 66274780 is 8747266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66274787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8727 + ... + 14446.

It is an arithmetic number, because the mean of its divisors is an integer number (3406578).

Almost surely, 2^66274780 is an apocalyptic number.

It is an amenable number.

66274780 is an abundant number, since it is smaller than the sum of its proper divisors (97240964).

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

66274780 is a wasteful number, since it uses less digits than its factorization.

66274780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23206 (or 23204 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 66274780 is about 8140.9323790337. The cubic root of 66274780 is about 404.6840598536.

The spelling of 66274780 in words is "sixty-six million, two hundred seventy-four thousand, seven hundred eighty".