72667650 has 48 divisors (see below), whose sum is σ = 196603488. Its totient is φ = 17616000.

The previous prime is 72667643. The next prime is 72667657. The reversal of 72667650 is 5676627.

It is an interprime number because it is at equal distance from previous prime (72667643) and next prime (72667657).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72667599 and 72667608.

It is not an unprimeable number, because it can be changed into a prime (72667657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20371 + ... + 23670.

It is an arithmetic number, because the mean of its divisors is an integer number (4095906).

Almost surely, 2^72667650 is an apocalyptic number.

72667650 is an abundant number, since it is smaller than the sum of its proper divisors (123935838).

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

72667650 is a wasteful number, since it uses less digits than its factorization.

72667650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44067 (or 44062 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 72667650 is about 8524.5322452320. The cubic root of 72667650 is about 417.2987065544.

The spelling of 72667650 in words is "seventy-two million, six hundred sixty-seven thousand, six hundred fifty".