66151884251 has 8 divisors (see below), whose sum is σ = 67060898784. Its totient is φ = 65247851200.

The previous prime is 66151884167. The next prime is 66151884269. The reversal of 66151884251 is 15248815166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66151884251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66151884196 and 66151884205.

It is not an unprimeable number, because it can be changed into a prime (66151874251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218626 + ... + 1271751.

It is an arithmetic number, because the mean of its divisors is an integer number (8382612348).

Almost surely, 2^66151884251 is an apocalyptic number.

66151884251 is a deficient number, since it is larger than the sum of its proper divisors (909014533).

66151884251 is a wasteful number, since it uses less digits than its factorization.

66151884251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490741.

The product of its digits is 460800, while the sum is 47.

The spelling of 66151884251 in words is "sixty-six billion, one hundred fifty-one million, eight hundred eighty-four thousand, two hundred fifty-one".