66251051 has 8 divisors (see below), whose sum is σ = 69217200. Its totient is φ = 63330400.

The previous prime is 66251021. The next prime is 66251069. The reversal of 66251051 is 15015266.

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

It is a cyclic number.

It is not a de Polignac number, because 66251051 - 2¹⁰ = 66250027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66251051.

It is not an unprimeable number, because it can be changed into a prime (66251021) 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, 8381 + ... + 14238.

It is an arithmetic number, because the mean of its divisors is an integer number (8652150).

Almost surely, 2^66251051 is an apocalyptic number.

66251051 is a deficient number, since it is larger than the sum of its proper divisors (2966149).

66251051 is a wasteful number, since it uses less digits than its factorization.

66251051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22749.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 66251051 is about 8139.4748602106. The cubic root of 66251051 is about 404.6357564399.

The spelling of 66251051 in words is "sixty-six million, two hundred fifty-one thousand, fifty-one".