66059997 has 8 divisors (see below), whose sum is σ = 90128544. Its totient is φ = 43015728.

The previous prime is 66059969. The next prime is 66060031. The reversal of 66059997 is 79995066.

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

It is not a de Polignac number, because 66059997 - 2⁷ = 66059869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66059797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255918 + ... + 256175.

It is an arithmetic number, because the mean of its divisors is an integer number (11266068).

Almost surely, 2^66059997 is an apocalyptic number.

It is an amenable number.

66059997 is a deficient number, since it is larger than the sum of its proper divisors (24068547).

66059997 is a wasteful number, since it uses less digits than its factorization.

66059997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512139.

The product of its (nonzero) digits is 918540, while the sum is 51.

The square root of 66059997 is about 8127.7301259331. The cubic root of 66059997 is about 404.2464206707.

The spelling of 66059997 in words is "sixty-six million, fifty-nine thousand, nine hundred ninety-seven".