72869665 has 16 divisors (see below), whose sum is σ = 95613696. Its totient is φ = 52873600.

The previous prime is 72869611. The next prime is 72869683. The reversal of 72869665 is 56696827.

It is a happy number.

It is not a de Polignac number, because 72869665 - 2²³ = 64481057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27384 + ... + 29926.

It is an arithmetic number, because the mean of its divisors is an integer number (5975856).

Almost surely, 2^72869665 is an apocalyptic number.

It is an amenable number.

72869665 is a deficient number, since it is larger than the sum of its proper divisors (22744031).

72869665 is a wasteful number, since it uses less digits than its factorization.

72869665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080.

The product of its digits is 1088640, while the sum is 49.

The square root of 72869665 is about 8536.3730588582. The cubic root of 72869665 is about 417.6850435305.

The spelling of 72869665 in words is "seventy-two million, eight hundred sixty-nine thousand, six hundred sixty-five".