80695651 has 4 divisors (see below), whose sum is σ = 85442472. Its totient is φ = 75948832.

The previous prime is 80695639. The next prime is 80695691. The reversal of 80695651 is 15659608.

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 80695651 - 2¹¹ = 80693603 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80695691) 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, 2373385 + ... + 2373418.

It is an arithmetic number, because the mean of its divisors is an integer number (21360618).

Almost surely, 2^80695651 is an apocalyptic number.

80695651 is a deficient number, since it is larger than the sum of its proper divisors (4746821).

80695651 is a wasteful number, since it uses less digits than its factorization.

80695651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746820.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 80695651 is about 8983.0758095432. The cubic root of 80695651 is about 432.1322808070.

The spelling of 80695651 in words is "eighty million, six hundred ninety-five thousand, six hundred fifty-one".