66736644 has 48 divisors (see below), whose sum is σ = 168262080. Its totient is φ = 20465280.

The previous prime is 66736619. The next prime is 66736693. The reversal of 66736644 is 44663766.

It is a junction number, because it is equal to n+sod(n) for n = 66736596 and 66736605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64854 + ... + 65874.

It is an arithmetic number, because the mean of its divisors is an integer number (3505460).

Almost surely, 2^66736644 is an apocalyptic number.

It is an amenable number.

66736644 is an abundant number, since it is smaller than the sum of its proper divisors (101525436).

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

66736644 is a wasteful number, since it uses less digits than its factorization.

66736644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The square root of 66736644 is about 8169.2499043670. The cubic root of 66736644 is about 405.6219555201.

The spelling of 66736644 in words is "sixty-six million, seven hundred thirty-six thousand, six hundred forty-four".