66402377 has 8 divisors (see below), whose sum is σ = 67010400. Its totient is φ = 65797344.

The previous prime is 66402367. The next prime is 66402409. The reversal of 66402377 is 77320466.

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 66402377 - 2¹⁰ = 66401353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66402337) 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, 72758 + ... + 73664.

It is an arithmetic number, because the mean of its divisors is an integer number (8376300).

Almost surely, 2^66402377 is an apocalyptic number.

It is an amenable number.

66402377 is a deficient number, since it is larger than the sum of its proper divisors (608023).

66402377 is a wasteful number, since it uses less digits than its factorization.

66402377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 66402377 is about 8148.7653666062. The cubic root of 66402377 is about 404.9436023688.

The spelling of 66402377 in words is "sixty-six million, four hundred two thousand, three hundred seventy-seven".