66976351 has 4 divisors (see below), whose sum is σ = 72128392. Its totient is φ = 61824312.

The previous prime is 66976333. The next prime is 66976361. The reversal of 66976351 is 15367966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66976351 - 2⁵ = 66976319 is a prime.

It is a super-3 number, since 3×66976351³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66976298 and 66976307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66976331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576001 + ... + 2576026.

It is an arithmetic number, because the mean of its divisors is an integer number (18032098).

Almost surely, 2^66976351 is an apocalyptic number.

66976351 is a deficient number, since it is larger than the sum of its proper divisors (5152041).

66976351 is a wasteful number, since it uses less digits than its factorization.

66976351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152040.

The product of its digits is 204120, while the sum is 43.

The square root of 66976351 is about 8183.9080517806. The cubic root of 66976351 is about 406.1070175797.

The spelling of 66976351 in words is "sixty-six million, nine hundred seventy-six thousand, three hundred fifty-one".