79620663 has 4 divisors (see below), whose sum is σ = 106160888. Its totient is φ = 53080440.

The previous prime is 79620577. The next prime is 79620691. The reversal of 79620663 is 36602697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36602697 = 3 ⋅12200899.

It is not a de Polignac number, because 79620663 - 2⁸ = 79620407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79620763) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 13270108 + ... + 13270113.

It is an arithmetic number, because the mean of its divisors is an integer number (26540222).

Almost surely, 2^79620663 is an apocalyptic number.

79620663 is a deficient number, since it is larger than the sum of its proper divisors (26540225).

79620663 is a wasteful number, since it uses less digits than its factorization.

79620663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26540224.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 79620663 is about 8923.0411295701. The cubic root of 79620663 is about 430.2048113915.

The spelling of 79620663 in words is "seventy-nine million, six hundred twenty thousand, six hundred sixty-three".