79620566 has 4 divisors (see below), whose sum is σ = 119430852. Its totient is φ = 39810282.

The previous prime is 79620547. The next prime is 79620577. The reversal of 79620566 is 66502697.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19905140 + ... + 19905143.

It is an arithmetic number, because the mean of its divisors is an integer number (29857713).

Almost surely, 2^79620566 is an apocalyptic number.

79620566 is a deficient number, since it is larger than the sum of its proper divisors (39810286).

79620566 is a wasteful number, since it uses less digits than its factorization.

79620566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39810285.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 79620566 is about 8923.0356942018. The cubic root of 79620566 is about 430.2046366886.

The spelling of 79620566 in words is "seventy-nine million, six hundred twenty thousand, five hundred sixty-six".