66768502 has 4 divisors (see below), whose sum is σ = 100152756. Its totient is φ = 33384250.

The previous prime is 66768467. The next prime is 66768521. The reversal of 66768502 is 20586766.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16692124 + ... + 16692127.

It is an arithmetic number, because the mean of its divisors is an integer number (25038189).

Almost surely, 2^66768502 is an apocalyptic number.

66768502 is a deficient number, since it is larger than the sum of its proper divisors (33384254).

66768502 is a wasteful number, since it uses less digits than its factorization.

66768502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33384253.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 66768502 is about 8171.1995447425. The cubic root of 66768502 is about 405.6864890248.

It can be divided in two parts, 667 and 68502, that added together give a square (69169 = 263²).

The spelling of 66768502 in words is "sixty-six million, seven hundred sixty-eight thousand, five hundred two".