66602601 has 32 divisors (see below), whose sum is σ = 109706240. Its totient is φ = 39657600.

The previous prime is 66602593. The next prime is 66602633. The reversal of 66602601 is 10620666.

It is not a de Polignac number, because 66602601 - 2³ = 66602593 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66602671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7821 + ... + 13941.

It is an arithmetic number, because the mean of its divisors is an integer number (3428320).

Almost surely, 2^66602601 is an apocalyptic number.

It is an amenable number.

66602601 is a deficient number, since it is larger than the sum of its proper divisors (43103639).

66602601 is a wasteful number, since it uses less digits than its factorization.

66602601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174 (or 6168 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66602601 is about 8161.0416614547. The cubic root of 66602601 is about 405.3502046344.

It can be divided in two parts, 6660 and 2601, that added together give a cube (9261 = 21³).

The spelling of 66602601 in words is "sixty-six million, six hundred two thousand, six hundred one".