66700497 has 4 divisors (see below), whose sum is σ = 88934000. Its totient is φ = 44466996.

The previous prime is 66700477. The next prime is 66700519. The reversal of 66700497 is 79400766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66700497 - 2⁷ = 66700369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66700477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11116747 + ... + 11116752.

It is an arithmetic number, because the mean of its divisors is an integer number (22233500).

Almost surely, 2^66700497 is an apocalyptic number.

It is an amenable number.

66700497 is a deficient number, since it is larger than the sum of its proper divisors (22233503).

66700497 is a wasteful number, since it uses less digits than its factorization.

66700497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22233502.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66700497 is about 8167.0372228857. The cubic root of 66700497 is about 405.5487090801.

The spelling of 66700497 in words is "sixty-six million, seven hundred thousand, four hundred ninety-seven".