66790659 has 24 divisors (see below), whose sum is σ = 97443840. Its totient is φ = 40671072.

The previous prime is 66790657. The next prime is 66790663. The reversal of 66790659 is 95609766.

It is not a de Polignac number, because 66790659 - 2¹ = 66790657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66790657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51582 + ... + 52860.

It is an arithmetic number, because the mean of its divisors is an integer number (4060160).

Almost surely, 2^66790659 is an apocalyptic number.

66790659 is a deficient number, since it is larger than the sum of its proper divisors (30653181).

66790659 is a wasteful number, since it uses less digits than its factorization.

66790659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 66790659 is about 8172.5552307709. Note that the first 3 decimals coincide. The cubic root of 66790659 is about 405.7313594908.

The spelling of 66790659 in words is "sixty-six million, seven hundred ninety thousand, six hundred fifty-nine".