72353666 has 64 divisors (see below), whose sum is σ = 148366080. Its totient is φ = 25589760.

The previous prime is 72353663. The next prime is 72353669. The reversal of 72353666 is 66635327.

It is an interprime number because it is at equal distance from previous prime (72353663) and next prime (72353669).

It is not an unprimeable number, because it can be changed into a prime (72353663) 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, 75446 + ... + 76398.

It is an arithmetic number, because the mean of its divisors is an integer number (2318220).

Almost surely, 2^72353666 is an apocalyptic number.

72353666 is an abundant number, since it is smaller than the sum of its proper divisors (76012414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72353666 is a wasteful number, since it uses less digits than its factorization.

72353666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 136080, while the sum is 38.

The square root of 72353666 is about 8506.0958141794. The cubic root of 72353666 is about 416.6968143164.

It can be divided in two parts, 7235 and 3666, that added together give a palindrome (10901).

The spelling of 72353666 in words is "seventy-two million, three hundred fifty-three thousand, six hundred sixty-six".