66364494 has 16 divisors (see below), whose sum is σ = 151690368. Its totient is φ = 18961272.

The previous prime is 66364483. The next prime is 66364537. The reversal of 66364494 is 49446366.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1580107 = 66364494 / (6 + 6 + 3 + 6 + 4 + 4 + 9 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790012 + ... + 790095.

It is an arithmetic number, because the mean of its divisors is an integer number (9480648).

Almost surely, 2^66364494 is an apocalyptic number.

66364494 is an abundant number, since it is smaller than the sum of its proper divisors (85325874).

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

66364494 is a wasteful number, since it uses less digits than its factorization.

66364494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580119.

The product of its digits is 373248, while the sum is 42.

The square root of 66364494 is about 8146.4405724218. The cubic root of 66364494 is about 404.8665800423.

The spelling of 66364494 in words is "sixty-six million, three hundred sixty-four thousand, four hundred ninety-four".