66700372 has 12 divisors (see below), whose sum is σ = 117236980. Its totient is φ = 33204096.

The previous prime is 66700369. The next prime is 66700373. The reversal of 66700372 is 27300766.

It can be written as a sum of positive squares in 2 ways, for example, as 49758916 + 16941456 = 7054^2 + 4116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35493 + ... + 37324.

Almost surely, 2^66700372 is an apocalyptic number.

It is an amenable number.

66700372 is a deficient number, since it is larger than the sum of its proper divisors (50536608).

66700372 is a wasteful number, since it uses less digits than its factorization.

66700372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73050 (or 73048 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 66700372 is about 8167.0295701681. The cubic root of 66700372 is about 405.5484557405.

The spelling of 66700372 in words is "sixty-six million, seven hundred thousand, three hundred seventy-two".