66704007 has 16 divisors (see below), whose sum is σ = 93576672. Its totient is φ = 42209280.

The previous prime is 66703999. The next prime is 66704047. The reversal of 66704007 is 70040766.

It is not a de Polignac number, because 66704007 - 2³ = 66703999 is a prime.

It is a super-3 number, since 3×66704007³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2778 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (5848542).

Almost surely, 2^66704007 is an apocalyptic number.

66704007 is a deficient number, since it is larger than the sum of its proper divisors (26872665).

66704007 is a wasteful number, since it uses less digits than its factorization.

66704007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14738.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 66704007 is about 8167.2521082675. The cubic root of 66704007 is about 405.5558227252. Note that the first 3 decimals are identical.

The spelling of 66704007 in words is "sixty-six million, seven hundred four thousand, seven".