64600061 has 4 divisors (see below), whose sum is σ = 66102432. Its totient is φ = 63097692.

The previous prime is 64600033. The next prime is 64600087. The reversal of 64600061 is 16000646.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16000646 = 2 ⋅8000323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64600061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64602061) 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, 751121 + ... + 751206.

It is an arithmetic number, because the mean of its divisors is an integer number (16525608).

Almost surely, 2^64600061 is an apocalyptic number.

It is an amenable number.

64600061 is a deficient number, since it is larger than the sum of its proper divisors (1502371).

64600061 is a wasteful number, since it uses less digits than its factorization.

64600061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502370.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 64600061 is about 8037.4163137167. The cubic root of 64600061 is about 401.2462402639.

The spelling of 64600061 in words is "sixty-four million, six hundred thousand, sixty-one".