66420595 has 8 divisors (see below), whose sum is σ = 81558576. Its totient is φ = 51900576.

The previous prime is 66420559. The next prime is 66420671. The reversal of 66420595 is 59502466.

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

It is a cyclic number.

It is not a de Polignac number, because 66420595 - 2⁷ = 66420467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154252 + ... + 154681.

It is an arithmetic number, because the mean of its divisors is an integer number (10194822).

Almost surely, 2^66420595 is an apocalyptic number.

66420595 is a deficient number, since it is larger than the sum of its proper divisors (15137981).

66420595 is a wasteful number, since it uses less digits than its factorization.

66420595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308981.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 66420595 is about 8149.8831279964. The cubic root of 66420595 is about 404.9806321074.

The spelling of 66420595 in words is "sixty-six million, four hundred twenty thousand, five hundred ninety-five".