66340579 has 16 divisors (see below), whose sum is σ = 73654272. Its totient is φ = 59433088.

The previous prime is 66340567. The next prime is 66340591. The reversal of 66340579 is 97504366.

It is an interprime number because it is at equal distance from previous prime (66340567) and next prime (66340591).

It is not a de Polignac number, because 66340579 - 2⁹ = 66340067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66340559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149532 + ... + 149974.

It is an arithmetic number, because the mean of its divisors is an integer number (4603392).

Almost surely, 2^66340579 is an apocalyptic number.

66340579 is a deficient number, since it is larger than the sum of its proper divisors (7313693).

66340579 is a wasteful number, since it uses less digits than its factorization.

66340579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 66340579 is about 8144.9726211940. The cubic root of 66340579 is about 404.8179418476.

The spelling of 66340579 in words is "sixty-six million, three hundred forty thousand, five hundred seventy-nine".