66456700 has 36 divisors (see below), whose sum is σ = 146943720. Its totient is φ = 26079040.

The previous prime is 66456679. The next prime is 66456703. The reversal of 66456700 is 765466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66456703) 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, 970 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (4081770).

Almost surely, 2^66456700 is an apocalyptic number.

It is an amenable number.

66456700 is an abundant number, since it is smaller than the sum of its proper divisors (80487020).

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

66456700 is a wasteful number, since it uses less digits than its factorization.

66456700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12606 (or 12599 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66456700 is about 8152.0978895006. The cubic root of 66456700 is about 405.0539987950.

The spelling of 66456700 in words is "sixty-six million, four hundred fifty-six thousand, seven hundred".