66051207 has 20 divisors (see below), whose sum is σ = 99604296. Its totient is φ = 43616880.

The previous prime is 66051191. The next prime is 66051217. The reversal of 66051207 is 70215066.

It is not a de Polignac number, because 66051207 - 2⁴ = 66051191 is a prime.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4857 + ... + 12477.

Almost surely, 2^66051207 is an apocalyptic number.

66051207 is a deficient number, since it is larger than the sum of its proper divisors (33553089).

66051207 is a wasteful number, since it uses less digits than its factorization.

66051207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740 (or 7731 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 66051207 is about 8127.1893665646. The cubic root of 66051207 is about 404.2284900833.

The spelling of 66051207 in words is "sixty-six million, fifty-one thousand, two hundred seven".