64566020601 has 36 divisors (see below), whose sum is σ = 98261782528. Its totient is φ = 40847959152.

The previous prime is 64566020591. The next prime is 64566020627. The reversal of 64566020601 is 10602066546.

It is a happy number.

64566020601 is a `hidden beast` number, since 6 + 45 + 6 + 6 + 0 + 2 + 0 + 601 = 666.

It is not a de Polignac number, because 64566020601 - 2⁶ = 64566020537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64566020641) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 551256 + ... + 658038.

Almost surely, 2^64566020601 is an apocalyptic number.

It is an amenable number.

64566020601 is a deficient number, since it is larger than the sum of its proper divisors (33695761927).

64566020601 is a wasteful number, since it uses less digits than its factorization.

64566020601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106962 (or 106936 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

It can be divided in two parts, 64 and 566020601, that added together give a palindrome (566020665).

The spelling of 64566020601 in words is "sixty-four billion, five hundred sixty-six million, twenty thousand, six hundred one".