72669765 has 32 divisors (see below), whose sum is σ = 138663936. Its totient is φ = 31775040.

The previous prime is 72669763. The next prime is 72669767. The reversal of 72669765 is 56796627.

It is an interprime number because it is at equal distance from previous prime (72669763) and next prime (72669767).

It is not a de Polignac number, because 72669765 - 2¹ = 72669763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72669763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12631 + ... + 17460.

It is an arithmetic number, because the mean of its divisors is an integer number (4333248).

Almost surely, 2^72669765 is an apocalyptic number.

It is an amenable number.

72669765 is a deficient number, since it is larger than the sum of its proper divisors (65994171).

72669765 is a wasteful number, since it uses less digits than its factorization.

72669765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30129.

The product of its digits is 952560, while the sum is 48.

The square root of 72669765 is about 8524.6562980568. The cubic root of 72669765 is about 417.3027550235.

The spelling of 72669765 in words is "seventy-two million, six hundred sixty-nine thousand, seven hundred sixty-five".