72497766 has 16 divisors (see below), whose sum is σ = 158177088. Its totient is φ = 21969000.

The previous prime is 72497759. The next prime is 72497779. The reversal of 72497766 is 66779427.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549160 + ... + 549291.

It is an arithmetic number, because the mean of its divisors is an integer number (9886068).

Almost surely, 2^72497766 is an apocalyptic number.

72497766 is an abundant number, since it is smaller than the sum of its proper divisors (85679322).

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

72497766 is a wasteful number, since it uses less digits than its factorization.

72497766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098467.

The product of its digits is 889056, while the sum is 48.

The square root of 72497766 is about 8514.5619969556. The cubic root of 72497766 is about 416.9732628395.

The spelling of 72497766 in words is "seventy-two million, four hundred ninety-seven thousand, seven hundred sixty-six".