66376401 has 16 divisors (see below), whose sum is σ = 108925824. Its totient is φ = 35011584.

The previous prime is 66376399. The next prime is 66376411. The reversal of 66376401 is 10467366.

It is not a de Polignac number, because 66376401 - 2¹ = 66376399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66376411) 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, 121296 + ... + 121841.

It is an arithmetic number, because the mean of its divisors is an integer number (6807864).

Almost surely, 2^66376401 is an apocalyptic number.

It is an amenable number.

66376401 is a deficient number, since it is larger than the sum of its proper divisors (42549423).

66376401 is a wasteful number, since it uses less digits than its factorization.

66376401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243160.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66376401 is about 8147.1713496158. The cubic root of 66376401 is about 404.8907920759.

The spelling of 66376401 in words is "sixty-six million, three hundred seventy-six thousand, four hundred one".