66736494 has 64 divisors (see below), whose sum is σ = 162766080. Its totient is φ = 20100960.

The previous prime is 66736477. The next prime is 66736507. The reversal of 66736494 is 49463766.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167904 + ... + 168300.

It is an arithmetic number, because the mean of its divisors is an integer number (2543220).

Almost surely, 2^66736494 is an apocalyptic number.

66736494 is the 4367-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66736494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81383040).

66736494 is an abundant number, since it is smaller than the sum of its proper divisors (96029586).

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

66736494 is a wasteful number, since it uses less digits than its factorization.

66736494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 696 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 66736494 is about 8169.2407235924. The cubic root of 66736494 is about 405.6216516224.

The spelling of 66736494 in words is "sixty-six million, seven hundred thirty-six thousand, four hundred ninety-four".