66666737374 has 8 divisors (see below), whose sum is σ = 101639452248. Its totient is φ = 32786919960.

The previous prime is 66666737353. The next prime is 66666737383. The reversal of 66666737374 is 47373766666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273224212 + ... + 273224455.

It is an arithmetic number, because the mean of its divisors is an integer number (12704931531).

Almost surely, 2^66666737374 is an apocalyptic number.

66666737374 is a deficient number, since it is larger than the sum of its proper divisors (34972714874).

66666737374 is a wasteful number, since it uses less digits than its factorization.

66666737374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546448730.

The product of its digits is 96018048, while the sum is 61.

The spelling of 66666737374 in words is "sixty-six billion, six hundred sixty-six million, seven hundred thirty-seven thousand, three hundred seventy-four".