66799590351 has 32 divisors (see below), whose sum is σ = 96730018560. Its totient is φ = 40760484864.

The previous prime is 66799590317. The next prime is 66799590397. The reversal of 66799590351 is 15309599766.

It is not a de Polignac number, because 66799590351 - 2¹⁰ = 66799589327 is a prime.

It is a super-2 number, since 2×66799590351² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66799570351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2450740 + ... + 2477846.

It is an arithmetic number, because the mean of its divisors is an integer number (3022813080).

Almost surely, 2^66799590351 is an apocalyptic number.

66799590351 is a deficient number, since it is larger than the sum of its proper divisors (29930428209).

66799590351 is a wasteful number, since it uses less digits than its factorization.

66799590351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27655.

The product of its (nonzero) digits is 13778100, while the sum is 60.

The spelling of 66799590351 in words is "sixty-six billion, seven hundred ninety-nine million, five hundred ninety thousand, three hundred fifty-one".